Robin van Persie remains on the recovery table despite David Moyes saying the Dutchman is "getting better," per Sky Sports. Juan Mata is ineligible after appearing in this season's competition with Chelsea, meaning Moyes' team is more than likely to pick itself.

More positively, Wayne Rooney is likely to shrug off the toe injury that kept him out of the weekend win over Newcastle, noted by MailOnline Sport:

BREAKING: Wayne Rooney training with Man United squad ahead of their trip to Munich after toe injury #mufc

Fellaini has failed to impress since joining United. The £27.5 million signing continues to be the subject of staunch criticism from supporters and a jovial figure to onlookers outside the club.

However, while his distribution, dribbling and tackling skills have consistently been poor this campaign, he could have been useful in the second-leg tie with Bayern.

Alex Livesey/Getty Images

Moyes deployed Fellaini in a dynamic role during the opening match. He aimed to shield the defence while also moving forward to support United's attack, although he often got lost somewhere between the lines. Even so, the 26-year-old could have aided the English side's defensive effort in what is sure to be a tough night for the fallen Premier League champions.

It's likely Moyes will bring Shinji Kagawa into his starting lineup after the Japanese international began the first leg on United's bench. Ryan Giggs may be deployed in the centre, but his anonymous performance in the opening match saw him substituted at the break. Tom Cleverley or Darren Fletcher could start, while Moyes may wish to begin Rooney in a central midfield role.

Alex Livesey/Getty Images

Bayern have major selection problems of their own. Pep Guardiola is without the suspended Bastian Schweinsteiger and Javi Martinez, while Thiago Alcantara is currently recovering from a knee injury, per Bundesliga's official website.

Guardiola confirmed he has just 14 players available for the match, per Bayern's official Twitter feed:

#Guardiola on his squad selection for #FCBMUFC: "We only have 14 first-team players so I haven't got too many options."

United have it all to do when they arrive at the Allianz Arena. Fellaini's injury certainly doesn't help, but Moyes will be confident of upsetting the European champions on their own turf.

The English side need a win or draw higher than 1-1 to progress and keep their season alive. A memorable performance is certainly needed, but with injury problems mounting, United's task certainly isn't getting any easier.